On the birthday of Carl Sagan | Bad Astronomy | Discover Magazine | Modern Atheism | Scoop.it

If Carl Sagan were still alive, he’d be 77 years old today. Perhaps he wouldn’t have been overly concerned with arbitrary time measurements, especially when based on the fickle way we define a "year", but it’s human nature to look back at such integrally-divisible dates… and Carl was very much a student of human nature.